tshing-tshiùnn清唱

to sing opera arias

to sing opera arias (without makeup and acting); to sing a cappella

English Wiktionary, “清唱” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%B8%85%E5%94%B1 · confidence: Medium (Wiktionary, Hokkien)